SubmittingPatches: The download location of External Editor has moved

Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 318b04f..8601949 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -266,8 +266,8 @@
 The following Thunderbird extensions are needed:
 	AboutConfig 0.5
 		http://aboutconfig.mozdev.org/
-	External Editor 0.5.4
-		http://extensionroom.mozdev.org/more-info/exteditor
+	External Editor 0.7.2
+		http://globs.org/articles.php?lng=en&pg=8
 
 1) Prepare the patch as a text file using your method of choice.